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Running Head: CONSEQUENCES of POOR POSTURE 1 Running Head: CONSEQUENCES OF POOR POSTURE 1 The Prevalence and Consequences of Poor Posture in Children and Adolescents Timothy D. Kounter A Senior Thesis submitted in partial fulfillment of the requirements for graduation in the Honors Program Liberty University Spring 2019 CONSEQUENCES OF POOR POSTURE 2 Acceptance of Senior Honors Thesis This Senior Honors Thesis is accepted in partial fulfillment of the requirements for graduation from the Honors Program of Liberty University. ______________________________ Jim Schoffstall, Ed.D. Thesis Chair ______________________________ Justin Kilian, M.Ed. Committee Member ______________________________ Anna Henderson, Ph.D. Committee Member ______________________________ David Schweitzer, Ph.D. Assistant Honors Director ______________________________ Date CONSEQUENCES OF POOR POSTURE 3 Abstract Correct posture is identified as a crucial aspect of healthy bodily functioning. The scientific community continues to discover evidence suggesting that improper sitting and standing posture results in musculoskeletal pain, degradation of ligaments, hindered respiratory functioning, and even increased feelings of negative emotions such as anxiety and depression. Whether due to limited physical capabilities, a lack of knowledge regarding the importance of physical posture, or other reasons, much of the general population consistently partakes in improper posture for increasing bouts of time despite the research. Technological advancements in particular seem to be exacerbating the situation, with the youngest and most tech-savvy generation being at the greatest risk for the negative consequences improper posture yields. CONSEQUENCES OF POOR POSTURE 4 The Prevalence and Consequences of Poor Posture in Children and Adolescents It is commonly acknowledged among the scientific population that correct posture is worthy of being maintained, taught, and exemplified (Hansraj, 2014; Kritz, 2008; Nair, Sagar, Sollers, Consedine, & Broadbent, 2015). However, the concept of "correct" posture may prove to be ambiguous when analyzing the various factors that encompass its meaning. The consequences of poor posture can prove detrimental to the individual, increasing in severity as long as the habits continue to go unresolved (Cuéllar & Lanman, 2017; Kado, Huang, Karlamangla, Barrett-Conner, & Greendale, 2004; Nair et al., 2015; Prieto, Myklebust, Hoffmann, Lovett, & Myklebust, 1996; Ting-Ting, Cinelli, Lyons & Lee, 2015). Poor postural habits can manifest at relatively young ages, even well before one’s teenage years (Kratěnová, ŽEjglicová, Malý & Filipová, 2007; Murphy, Buckle & Stubbs, 2004). Despite the symptoms becoming apparent at strikingly early ages, these habits are often left untreated for the majority of one’s lifetime which can lead to a variety of musculoskeletal issues in the later stages of one’s life (Boyle, Milne & Singer, 2002; Milne & Williamson, 1983). It is probable that, had individuals suffering from the consequences of poor posture implemented proper postural habits at an earlier age, such consequences could have been lessened or perhaps altogether avoided. This thesis will attempt to shed light on the common pitfalls of incorrect posture and the areas in which this problem can be most prevalent. Additionally, it will review in detail the specific anatomical intricacies of poor posture that are commonly seen in the general public and kids and elaborate on the most common areas in which such postural nuances are lacking in children in the modern age. Furthermore, it will review the CONSEQUENCES OF POOR POSTURE 5 anatomical specifics of correct posture regarding angles of joints, lengths and activation of muscles, and ideal body positioning. A Comprehensive Explanation of Proper Standing and Seated Posture An understanding of proper posture is essential to comprehending and appreciating its importance in everyday life, as well as revealing the specificity that the term "posture" entails. Simply put, posture is the position in which the body is held and maintained during its everlasting defiance of gravity. Even when standing still and not in contact with visible external forces (excluding contact between feet and the ground), the body is, at all times, subject to the influences of external forces (most notably gravity, but also minute fluctuations in wind currents). Thankfully, the human body is capable of counteracting such forces usually without the need to devote conscious thought to its resistive actions. The nuances of proper posture are explored by Wright and Rothenburg (2011), who stated, "to maintain standing balance, the postural control system integrates information from the visual, vestibular, and proprioceptive systems" (p. 100). The body as a whole constantly receives signals from external visual cues and internal neuromuscular signals which are interpreted by the central nervous system to maintain tonic muscular activity that will assist in the body remaining in its desired position in relation to the center of gravity. Muscles, connective tissue, proprioceptors, etc. must work in conjunction and relation to each other to maintain a body’s posture (Wright & Rothenburg, 2011). The complexity of the mechanisms is difficult to comprehend, but the scientific community has procured a thorough understanding that continues to grow. CONSEQUENCES OF POOR POSTURE 6 Correct posture is that which keeps the joints and bones in alignment with each other, resulting in evenly distributed body weight that is stacked upon itself such that the greater weight is borne by the anatomical structure located inferiorly. For example, while the cervical spine bears the weight of the head, the lumbar spine bears the weight of the head and the cervical spine, and so on until we have reached the feet (which bear the entirety of the body's weight). The mechanical structure of human anatomy is naturally inclined to specific positions that will properly distribute and direct the weight through the joints. Maintaining this position will significantly reduce abnormal wearing of joint surfaces that cause arthritis, improve the health of the ligaments, and eliminate unnecessary burdens on the muscles. It largely prevents strain and overuse issues as well as backaches and muscular pain. Correct posture will assure the maintenance of a neutral spine throughout the process of aging, avoiding altogether symptoms of scoliosis, kyphosis, etc. (Cleveland Clinic, 2015). It’s importance to the performance and basic operation of the human body cannot be understated. It can be far too easy for one's standing posture to degrade after extended periods of time and over the course of one's lifetime. The American Chiropractic Association (2019) outlines clear standards for standing that incorporate injury-preventative maintenance. According to the ACA, the ideal standing position is one that encompasses several key physical cues. First, the neck demonstrates a 0-degree flexion, extension, and lateral flexion. The ears and the atlantoaxial joint are at rest directly above the glenohumeral joints. As the structural purpose of the neck is to uphold the relatively heavy head, maintaining this posture ensures the least amount of physical stress and CONSEQUENCES OF POOR POSTURE 7 weight to be borne by the neck. In addition to proper neck positioning, the ACA recommends retracting the scapulae, activating the major and minor rhomboids and trapezius muscles and preventing a forward rounding of the shoulders in the process. The arms are to remain entirely relaxed, and there is no flexion, extension, or lateral flexion of the back. The pelvis is not to be tilted forward; doing so typically denotes a number of related issues and potential consequences. There is a slight bend in the patellofemoral joint to ensure adequate blood flow throughout the body, and the q angles are between 18 and 22 degrees. Finally, the feet are to be held directly below each shoulder, arched, and with the weight of the body held primarily on the balls of the feet. When standing for extended periods of time, the weight should be shifted between the feet or from the toes to the heels (American Chiropractic Association, 2019). Using these guidelines will enhance longevity and avoid the consequences of poor posture. Although often overlooked, seated posture is equally as important as standing posture and perhaps more important for those who engage in lifestyles that require extended periods of being in a seated position (ex. students, truck drivers, and office- workers to name a few). Schmidt, Amereller, Franz, Kaiser, and Schwirtz (2014) performed a meta-analysis of optimal and preferred joint angles in automotive sitting posture and concluded, "there is still a lack of information in methodology and description of background . we suggest undertaking further research in the field of biomechanics and ergonomics to work out a scientific based and objectively determined ‘optimum’ joint angles" (p. 247). After analyzing 30 qualified articles, Schmidt has concluded that more research must be devoted to this topic. Rosário (2014) agreed, who CONSEQUENCES OF POOR POSTURE 8 states in his photographic analysis of human posture that, "The study of posture is not an easy task, mainly because postural assessment is still scientifically inaccurate" (p. 56), as do Claus, Hides, Moseley, & Hodges (2009) who, in an article questioning the existence of an ideal sitting posture, explicitly states, "There is a lack of quantitative evidence for spinal postures that are advocated
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